双脉冲激光诱导土壤中Pb和Ba光谱增强研究  

Spectral enhancement of Pb and Ba in soil induced by dual-pulse laser

作　　者：邓承付 邱荣[1,2] 王慧丽[1,2] 郭德成 周强 史晋芳[1,3] 叶成[1,2] 林小明 吕罗庚 王昶沣 Deng Chengfu;Qiu Rong;Wang Huili;Guo Decheng;Zhou Qiang;Shi Jinfang;Ye Cheng;Lin Xiaoming;Lü Luogeng;Wang Changfeng(Joint Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology,Mianyang 621010,China;School of Science,Southwest University of Science and Technology,Mianyang 621010,China;School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学极端条件物质特性联合实验室,四川绵阳621010 [2]西南科技大学理学院,四川绵阳621010 [3]西南科技大学制造学院,四川绵阳621010

出　　处：《强激光与粒子束》2019年第1期92-96,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金项目(U1530109)

摘　　要：为获得共线双脉冲激发方式对土壤中Pb和Ba元素的谱线增强效果,研究了1064nm单脉冲和(355nm+1064nm),(1064nm+355nm)共线双脉冲三种激发方式下,谱线强度随采集延迟时间的变化规律和谱线增强倍数随双脉冲时间间隔的变化规律。研究发现,与单脉冲激发方式相比,在双脉冲激发方式下,谱线Pb I 405.78nm和Ba I 553.55nm强度的最大增强倍数分别为5和8。该研究结果为检测土壤中重金属元素提供了参考。In order to explore the enhancement effect of collinear dual-pulse excitation on the spectral intensity of Pb and Ba elements in soil,the variations of spectral intensity with the acquisition delay time and spectral enhancement times with the time interval of dual-pulses under the three excitation modes of 1064 nm single pulse,(355 nm+1064 nm)and(1064 nm+355 nm)collinear dual-pulses were studied.The results show that,compared to a single 1064 nm pulse,maximum enhancements by times of 5 for the Pb I 405.78 nm and 8 for the Ba I 553.55 nm were observed under the mode of dual-pulses.The results provide a reference for the detection of heavy metals in soil.

关 键 词：光谱学 激光诱导击穿光谱 共线双脉冲 土壤 

分 类 号：O433.2[机械工程—光学工程] O433.4[理学—光学]